Plate-bending machine



June 6, 1944. P. s. PIcKARD PLATE BENDING MACHINE Filed Jul 24, 1942 a Sheets-Sheet 1 ull III] ll INVENTORV PauZ 6T E. Z H

June 6, 1944. s. PICKARD 2,350,530 w PLATE BENDING MAcnINp Filed July 24, 1942 3 Sheets-Sheet 2 v INVENTOR PauZ 6. P/c/(czr'd Patented June 6, 1944 PLATE -BENDING MACHINE Paul S. Pickard, Lakewood, 0010., assignor to Remington Arms Company, Inc., Bridgeport, Conn, a corporation of Delaware Application July 24, 1942, Serial No. 452,127

6 Claims.

This invention relates to a device for bending metal around an article positioned thereon, and, particularly, for the bending of a metal plate around a portion of a handle or bail. One use of such a plate with handle attached is in ammunition box liners.

The usual small arms ammunition box is made of wood with a metal waterproof liner such as terneplate or other similar material. Such a liner generally has a cover aflixed thereto by solder after the box has been filled and a handle is provided on the cover strip so as to facilitate opening of the liner. The attaching of the handle to the plate by bending a portion of the plate around the handle is frequently'a difficult and tedious operation. This same problem arises in other arts in the attaching of a handle or similar article to a plate.

One of the purposes of the present machine is to facilitate the positioning and bending of the Fig. 5 is similar to- Fig. 4 after the bending roll has been rotated approximately 90.

Fig. 6 is similar to Figs. 4 and 5 with the exception. that the bending is complete.

'7 is a perspective view of a plate with the handle attached thereto.

Fig. 1 8 is perspective View of one type of ammunition box with the liner torn open.

Fig. 9 is a fragmentary top view of a modification.

Fig. 10 is an enlarged fragmentary side View partia'ly in section of the modification shown in Referring to Figs. 7 and 8, the top plate which soldered on a terneplate liner is shown at as with the handle '2! attached. part of the plate which is bent back over a portion of the handle maybe fastened to the plate by spot weld .at or by soldering, riveting or in ny er suitable manner. In Fig. 8, the wooden box 2% has the liner with the plate 25 soldered thereon. Theboxis shown in a partially open condition which has been accomplished by grasping the handle 21 and pulling upwardly. Usually such a box-has a wooden cover which -is n0t shown.

In general, in order to operate the machine, a plate is placed on a table and then a handle placed in position on top of the plate. The mechanism is then operated, whichturns the edge of the plate over the'handle so that it may be fastened in any manner desired. The machine serves to clamp the plate in place on the table when the bending means starts to operate and also to hold the handle inplace until the bending means has bent the metal sufiiciently far so that the handle-holding means can be retracted. The retraction of the handle-holding means is necessary in order to complete the-bendingC-f the plate.

A table or support26 is provided for carrying the plate 2'! to be formed. The cover 28 is spaced from the support 25 so that the plate may he slipped between the support 26 and cover 28. The cover 28 terminates at its forward'end in a shape 29 to position the article or handle as will be described presently. A clamping plate 30 may be pivotall attached-to the shaft 3| in any suitable manner. The clamping plate 3 0 may'have downwardly projecting portions 32 for the purpose of resting-on the plate to be bent. In the form shown in Figs. 1-8, inclusive, the projection 32 rests directly on the plate to be bent. Mounted on top-of the clamping plate 3!! is the mechanism 35 carrying the retractable article-holding means -34. The article-holding plunger 34 is reciprocably mounted in the body-33 and urged forwardly by spring 35 (Fig. 2). Plunger 34 base cutout portiont'l to 'fit over the portion-of the handle indicated at-38 when it is placedon top of the plate preparatory to the bending operation. The spring 36- yieldably holds the article or handle 2| in position. The body 33 is pivotallymounted at 6B and is adjustable about the pivot by means of 'the studlil, nuts 62 and bracket'li3. The bracket 64 is so arranged as to allow removal and adjustment of the mechanism '35-. I

Attached to the side of the clamping plate .39 ispa bracket il. The bracket Mloarries a rod M which in turn is:attached to 'a spring :42 through the bracketdil. The rod 4! may be, mounted in a ball and-socket jcintM-in the bracket 43. As will be explained presently, when the bending "operation takes place, tension is placed on the rod 4! so as to urge the clamping plate iil in a clockwise direction as viewed in Fig. 2. Plate 21 is clamped on the support 26 through projections 320i the clamping plate St and the handle 2i which has previously been placed in position on the plate 21 is also held in position when rod 4| is put under tension.

The bending means itself includes a bending roll 45 which is journalled in bearings 46. As the roll is turned in a counterclockwise direction (Fig. 2), the top surface 41 (Figs. 4 to 6) will hand the plate upwardly as shown in detail in Fig. 5. As the roll continues it movement, the edge thereof contacts the plunger 34 and moves it inwardly into the body 33 as shown in Fig. 6. In this manner, the metal of the plate is bent back on itself and the plunger is moved out of the way. The cam surfaces preferably are so designed that a movement of about 110 degrees takes place before the plunger is moved inwardly releasing its grip upon the handle, although the exact amount is a matter of design according to the use of the machine. In this manner, the bend is properly made around the portion 38 of the handle 2| before the handle is released by plunger 34. The continued bending movement and forming of the plate is then such that the handle will not be displaced appreciably under the continued bending. A recess 48 is cut in the top of the roll 45 so as to fit over the handle or other article to be held. It is to be understood, of course, that this recess must be shaped to fit the handle or article being inclosed by a portion of the plate.

The bending roll is rotated by means of a pulley wheel 49 located on the shaft 50 carrying the bending roll. A flexible cable 5| of suitable construction is fastened at one end 53 to the lever 52. The cable is carried around the groove in the pulley 49 and then over asuitable guide 54 to a return spring 55. The lever 52 may be pivoted to the main frame at 56 and pulled downwardly by a pull rod 57 suitably attached to a foot pedal 58.

The manner in which the clamping means is operated will now be described. The spring 42 has one end attached to the bracket 59 which in turn is fastened to lever 52. When the foot pedal is pressed downwardly, the cable 5l' is moved so as to rotate the pulley49 in a counterclockwise direction as viewed in Fig. 2. This servesto elongate the return'spring 55. At the same time the bracket 59 is moved downwardly, thereby placing tension on handle 2| and clamping plate 21 firmly on the support 26. Th article holding plunger 34 will hold the article in turn spring will return the bending roll to its' original position as shown in Figs. 2 and 4.

Inthe operation of the machine, the plate to be bentis slipped between the'support 26 and cover 28 until the end thereof is over the bending face 41 of bending roll 45, as shown in Figs. 2 and 4. The ring 2| is then placed in position so that the rear portion of it abuts the cut-away portions 29pm cov'erdplate 28 and theforward portion is underneath the cut-out portion 31 on plunger 34. "Then'the foot pedal is pressed downwardly which starts the'rotation of the bending roll As the footpedallis started in its downward movement, tension is placed on rod 4| which urges theclamping plate 30 in a clockwise direction, as viewed in Fig. 2, and firmly holds tthe plate 21 in position, This also serves to cause the plunger 34'to firmly engage the han-' until part of the roll 45 engages the face of the plunger 34 and causes it to move into body 33 compressing spring 36. In this manner the article holding plunger 34 is removed out of the path of the metal being bent so that the bending may continue to the position shown in Fig. 6 until one portion of the handle is surrounded as shown.

A further modification is shown in Figs. 9 and 10 wherein the projection 32 of the clamping plate 30 rests on the rear portion of the handle 3| instead of directly on the plate. The clamping force on the plate 2'! is thus transmitted through the handle instead of being directly upon the plate. The other reference numerals in Figs. 9 and 10 indicate similar parts to those shown and described in the preceding figures.

It is evident that an improved device has been evolved for bending metal and particularly around handles or other article to be fastened to a plate. The invention is not to be limited to the details and construction shown, described and illustrated but is to be construed as covering all equivalents falling within the scope of the appended claims. 7

What is claimed is:

1. In a machine of the character described, a support, pivoted means for clamping a plate on the support, yieldable means mounted on the pivoted means for temporarily holding an article on said plate, means to bend said plate around at least a portion of the article, operating means for said bending means, and a yieldable connection between said operating means and the pivoted means to hold the plate and article thereon when the bending means is operated.

2, In a machine of the character described, a support, pivoted means for clamping a plate on the support, yieldable means mounted on the pivoted means for temporarily holding an article on said plate, means to bend a portion of said plate around at least a portion of the article, means operable by said bending means to retract the yieldable article holding means as the plate is bent therearound, operating means for said bending means, and a yieldable connection between said operating means and the pivoted means to hold the plate and article thereon when the bending means is operated.

3. In a machine of the character described, a support, pivoted means for clamping a plate on the support, yieldable means mounted on the pivoted means for temporarily holding a ringlike handle near a margin of said plate, bending means for bending a portion of said plate around a portion of said ring, means operable by said bending means to retract the yieldable means as the plate is bent around the handle, operating means for the bending means, and a yieldable connection between the operating means and the pivoted clamping meansto operate the clamping means substantially simultaneously with the bending means.

plate portion is adapted to be placed, a recess in the face of the bending-means to accommodate the ring as the bending means is operated, and means on said bending means to retract the yieldable means as the plate is bent around the ring-like handle.

5. In a machine of the character described, a support, pivoted means for clamping a plate on the support, yieldable means mounted on the pivoted ,means for temporarily holding a ringlike handle near a margin of said plate, rotatable bending means over which said marginal plate portion is adapted to be placed, a recess in the face of the bending means to accommodate the ring as the bending means is operated, means on said bending means to retract the yieldable means as the plate is bent around the ring-like handle, and means to rotate the bending means including a lever and yieldable connections between the lever and the pivoted means.

6. In a machine of the character described, a support, means to position a plate on said support, means to position a ring-like handle on said plate, pivoted means having a portion adapted to apply pressure on a portion of the handle and thereby clamp the handle and plate in position, means carried by the pivoted means for yieldably clamping another portion of the handle, means to bend a portion of said plate around said last mentioned portion of the handle, and means on said bending means to retract said yieldable holding means as the plate is bent around the handle.

PAUL S. PICKARD. 

